Iowa weather in September 2025

The temperatures in Iowa in September are comfortable with low of 13°C and and high up to 25°C.

You can expect about 3 to 8 days of rain in Iowa during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Iowa in September 2025.

If you’re planning to visit Iowa in the near future, we highly recommend that you review the 14 day weather forecast for Iowa before you arrive.

Temperatures

25° / 13°

Rainy Days

Snowy Days

Dry Days

Rainfall

128

Sun Hours

10.4

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 27° /13°	2 32° /14°	3 30° /16°	4 30° /15°	5 32° /17°	6 29° /16°
7 28° /14°	8 26° /12°	9 28° /12°	10 27° /14°	11 29° /15°	12 29° /15°	13 29° /13°
14 30° /15°	15 30° /16°	16 30° /16°	17 29° /16°	18 29° /16°	19 30° /17°	20 31° /17°
21 26° /15°	22 23° /12°	23 24° /11°	24 27° /13°	25 27° /12°	26 27° /13°	27 26° /14°
28 24° /11°	29 26° /12°	30 27° /15°

Explore the weather in Iowa in other months

Iowa annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-2° / -9°	3	16	12	44 mm	Awful	Iowa in January
February	-1° / -8°	2	15	11	54 mm	Awful	Iowa in February
March	9° / 1°	7	18	6	103 mm	Awful	Iowa in March
April	15° / 6°	8	20	2	137 mm	Bad	Iowa in April
May	21° / 12°	9	22	0	218 mm	Ok	Iowa in May
June	27° / 17°	9	21	0	208 mm	Good	Iowa in June
July	28° / 18°	7	24	0	126 mm	Good	Iowa in July
August	28° / 17°	7	24	0	157 mm	Good	Iowa in August
September	25° / 13°	6	24	0	128 mm	Perfect	Iowa in September
October	17° / 7°	5	25	1	97 mm	Good	Iowa in October
November	9° / 1°	4	23	3	71 mm	Bad	Iowa in November
December	2° / -5°	3	19	8	56 mm	Awful	Iowa in December